Quick answers
- Is CVE-2026-124922 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-124922 being exploited in the wild.
- How severe is CVE-2026-124922?
- Informational severity, published 10 November 2026.
- Which products and versions are affected?
- Mozilla Firefox prior to 160; Mozilla Firefox ESR prior to 153.7.
- Is there a fix for CVE-2026-124922?
- Yes: fixed in Firefox 160, Firefox ESR 153.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-124922 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-124922?
- Check whether you run Mozilla Firefox or Mozilla Firefox ESR at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: Firefox 160, Firefox ESR 153.7
Technical details
A use-after-free flaw exists in the CSS Transitions and Animations component, allowing memory safety violations when processing CSS animations or transitions. The vulnerability requires user interaction (visiting a malicious webpage) over the network. An attacker could trigger the defect to crash the browser, cause a denial of service, or potentially achieve code execution within the browser sandbox.
Affected products
- Mozilla Firefox prior to 160
- Mozilla Firefox ESR prior to 153.7
Timeline
- 2026-11-10: disclosed
- 2026-11-10: patched